Subject
Bank Exam
Topic
EXIM Bank Ltd. - Trainee Assistant Officer - 2018
The ratio of boys and girls in a school is 3 to 7. If there are 150 boys and girls, how many boys are there ?
The ratio of boys and girls in a school is 3 to 7. If there are 150 boys and girls, how many boys are there ?
ক)
75খ)
45গ)
25ঘ)
95Explanation
Solution: প্রশ্নে বলা হচ্ছে যে, বালক ও বালিকার অনুপাত 3:7 হলে 150 জনের মধ্যে কত জন বালক থাকবে ? বিজোড় পদগুলো হলো 3, 4, 5, 6 ...... অর্থাৎ 1 করে বাড়ছে । জোড় পদগুলো হলো 6, 9, 12 ...... অর্থাৎ 3 করে বাড়ছে । ৮ম সংখ্যা যেহেতু জোড় পদ তাই এর মান হবে = 12 + 3 = 15 Shortcut: অনুপাতের যোগফল 3 + 7 = 10 বালকের সংখ্যা = = 45Related questions
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